Carbon dioxide gas sensor with ionic gel

Author

Ishizu, Kentaro ; Takei, Y. ; Honda, Masakazu ; Noda, Kentaro ; Inaba, A. ; Itoh, Takayuki ; Maeda, Ryutaro ; Matsumoto, Kaname ; Shimoyama, Isao

Author_Institution

Univ. of Tokyo, Tokyo, Japan

fYear

2013

fDate

16-20 June 2013

Firstpage

1633

Lastpage

1636

Abstract

This paper reports on a low-power-consumption carbon dioxide (CO₂) gas sensor based on an ionic gel. Ionic gel is a mixture of ionic liquid and polymer. We employed 1-ethyl-3-methyl-imidazolium tetrafuloroborate ([EMIM][BF₄]) as ionic liquid and polyvinylidene fluoridecohexafluoro propylene (PVDF-HFP) as polymer. The [EMIM][BF₄] selectively absorbs CO₂ gas. Our proposal sensor consisted of an ionic gel and two Pt electrodes patterned under the ionic gel. The CO₂ gas concentration can be detected by measuring the electrochemical impedance between the two electrodes. The sensor was able to measure the difference of 500 ppm CO₂ gas concentration by using power as small as 0.65 μW.

Keywords

carbon compounds; chemical variables measurement; electric impedance measurement; electrochemical electrodes; gas sensors; platinum; polymer gels; 1-ethyl-3-methyl-imidazolium tetrafuloroborate; CO₂; PVDF-HFP; Pt; [EMIM][BF4]; carbon dioxide gas sensor; electrochemical impedance measurement; electrode; gas concentration; ionic gel; ionic liquid mixture; ionic polymer mixture; low-power-consumption; polyvinylidene fluoridecohexafluoro propylene; Carbon dioxide; Electrodes; Gas detectors; Impedance; Impedance measurement; Liquids; Ionic gel; carbon dioxide; gas sensor; impedance measurement; ionic liquid;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on

Conference_Location

Barcelona

Type

conf

DOI

10.1109/Transducers.2013.6627097

Filename

6627097